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Jquery Difference between jQuery(fn) and executing your code before


Using the document-ready event can have small performance drawbacks, with delayed execution of up to ~300ms.

Sometimes the same behavior can be achieved by execution of code just before the closing tag:

<body>
 <span id="greeting"></span> world!
 <script>
 $("#greeting").text("Hello");
 </script>
</body>


will produce similar behavior but perform sooner than as it does not wait for the document ready event trigger as it does in:

<head>
 <script>
 jQuery(function($) {
 $("#greeting").text("Hello");
 });
 </script>
</head>
<body>
 <span id="greeting"></span> world!
</body>

Emphasis on the fact that first example relies upon your knowledge of your page and placement of the script just prior to the closing tag and specifically after the span tag.

Conclusion

In this page (written and validated by ) you learned about Jquery Difference between jQuery fn and executing your code before body . What's Next? If you are interested in completing Jquery tutorial, your next topic will be learning about: Jquery Events.



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